Corrugated-fastener machine.



S. C. CARY & H. H. BRAND.

CORRUGATED FASTENER MACHINE.

APPLICATION FILED 001.8.191/1.

l1 ,QU Patented Nov. 28, 1916.

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SPENCER C. CARY AND HERMAN BRAND, OF NEVI YORK, N. Y., ASSIGNORS TO CARYMANUFACTURING CO., OF BROOKLYN, NEW/V YORK, A CORPORATION OF NEVI YORK.

CORRUGATED-FiSTENEE MACHINE.

Specification of Letters Patent.

Patented Nov. 28, Mliti.

Application filed @ct-ober 8, 1914. Serial No. 865,678.

To all whom 'it 'muy concern Be it known, that we, SPENCER C. CARY andHERMAN H. BRAND, both citizens of the United States, residing at thecity of New York, borough of Brooklyn, county of Kings, and State of NewYork, have invented a' certain new and useful CorrugatedlfastenerMachine, of which the following is a specification.

This invention is a machine for producing corrugated fasteners.

in the art of metal fasteners there is a. well known product consistingof a length of corrugated metal provided with a toothed driving edge,said driving edge being formed with points of a forni termed saw teeth.

lt has been customary heretofore to first corrugate a piece of metalstock having the appropriate width, gage or thickness and temper, and tothereafter manipulate said strip to produce the saw teeth on the drivingor penetrating edge. Such subsequent manipulation has been performed indiiferent ways, the most common of which has heretofore been by grindingbevels on the respective faces of the corrugated strip. lt

has been proposed, also, to cut away the metal by cutters alleged to actwith a single cutting stroke, said single stroke cutters moving in apath inclined to the median line of the strip.

in a prior application filed by us on Dec. 2l, 1918, Serial No. 809,617Awe have disclosed a machine for making corrugated fasteners whichembodies, among other mechanisms, certain rotary milling cuttersoperating on the respective faces of the strip to produce bevelsresulting in the saw point teeth. All such prior tooth formingoperations, however, necessarily result in the removal of metal from thecorrugated stock, but notwithstanding that a great amount of study andexperiment has been devoted to the subject there are certain probleinsinthe manufacture of corrugated fasteners'which have been unsolved untilour present invention.

@ne chief difficulty in the rapid and economical manufacture of sawtooth corrugated fasteners has been to determine with accuracy andprecision the location of the points of the teeth in the median plane ofthe fastener at the driving edge thereof, and another difficulty hasbeen to produce sharp points on the teeth of said fastener. Manifestly,the points should be located in the median plane of the fastener for thereason that should the points be at one side or the other, the fastenerwill not drive straight into the wood, and, again, dull points on theteeth will interfere with the easy and rapid penetration by thefastener.

lt is well known that there are variations in the metal stock, both inrespect to its gage and to the quality or texture of the meta-l; thethickness may and frequently does vary one, two or more gages, and themetal may be hard or soft according to the treatment accorded thereto.Such variations in the metal have resulted in more or less imperfectionsin, and increased the cost of production of, the articles.

The object of this invention is to obviate the foregoing and otherdifficulties, whereby we are enabled to produce saw tooth corrugatedfasteners economically and rapidly, such articles being characterized,mainly, by the location with precision of the points in the median lineof the fastener and by the presence of ysharp points on the teeth.

, According to this invention the corrugated metal stock is not cut awayon the driving edge to form the bevels, as has heretofore been customarywhen the stock is subjected to the action of grinders or cutters, butthe salient feature consists of means, preferably in the forni of dies,for displacing the metal cf the corrugated stock by a compressing actionof said dies so as to impart the required bevels preliininarily to thestock on the respective faces thereof and at the driving edge. The metaldisplaced or compressed by the action of the dies fills in the spacesbetween the corrugations, thus resulting in fillets on the driving edge,but subsequently to the compressing or swaging action of said dies, themetal stock is subjected to further treatment, preferably by clearingdies, which remove or cut out the fillets so as to result in theproduction of saw teeth the points of which lie in the median plane ofthe fastener.

@ther features and advantages of the invention will appear in the courseof the following detailed description.

ln the drawings, Figure 1 is a side ele ration of a machine forproducing corrugated fasteners embodying the present iuvention. Fig. Q asectional plan view of n the machine shown in nig. l, the plane 0i thesection berno' below the reci rocating C head carrying the swagingV diesand the fil- VVlet clearing' dies -i'llustratino more Darticularlytheineansfor guiding themetal stock Vand for'ixedly clamping thecorrugated stock inthe several positions required to be assumed byY saidstock during the operations of Vthe swaging dies and the illet clearingdies;l 3,4, 5 and@ are vertical sections on the planes indicated by thedotted lines 'Le-fl, and 6&6, respectively, of Fig. l to illustratetlie'gswaging, pointing andthe two fillet vclearing operations performedby the respective dies. Fig. 7 is a de ail'perspective View of a portionof one of the fillet clearing dies. F ig. 8 is a side elevation oi themetal showing the successive operations thereon whereby the driving edgeVis iirst'ccmpressed, said edgeis pointed so as to accurately locate thepoints in the .plane t the median line of the fastener, and tosuccessively remove the iillets from lthe re Y spective faces of thecorrugated and swaged strip.

i designatesv a horizontal stationary bed supported at a suitableelevation in any way Y and B is a guideway for areciprocating head towhich Vmotion is communicated Jrom any suitable source andby appropriatemeans, such for example the pitman c. '-Tll` Y lne head C is iitted forsliding movement in the'uidewa'* B so as to bel limited to re,-

CD l

Y Y ciprocating movement in a rectilinear path relative to the bed A.Said reciprocating head VC is equipped with a series of dies, hereinshown as four in number and indicated by the reference characters l) E FG. Said dies perform several operations upon the driving edge of thecorrugated stock, the

die D operating mainly to'displace the meta-l without cutting orremoving it so as'to pre liininarily 4erin bevels upon the respectivefaces or saidy corrugated stri J, whereas the die Ewhentlie latter isemployed produces sharp points upon the teeth and coperates with the dieD in accurately locating said points in the median plane of thefastener,

` terial without deliection.

Prior to the action of VtheV dies upon the metalstock the latteriscorrugated by any suitabletform 'of corrugating mechanism occupyinga-de'sired relation to the bed so that a continuous stripof metal willpass from the co'rrugating mechanism to the bed for ,Y Y Y 1,206,302

the purpose of presenting the corrugated stock in the p; th of the dies.The metal strip oi a desired gage and texture is supported and fed tothe machine in substantially the manner and by substantially the meansdisclosed in our prior application Serial No. 809,617, to whichreference has been made, but as the means for suliporting and feedingthe metal stoclr and for corrugating said stoer are not essentialfeatures of the present invention, we have not considered it necessaryto illustrate or descr'be the same in detail herein. Merely for thepurpose o'l illustration we have indicated in a conventional way thecorrugating mechanism as consisting oi corrugating rolls Il lfi, thesame being suitably supported and provided at their peripheral portionswith teeth adapted to act upon the metal stock S so as to produce thecorrugations in said stock as it is Yfed between the rolls. As shown,the ceri'ugating rolls are adjacent to the bed and in alinement with aguideway I on said bed, through which guideway the corrugated metalstock is directed and by which said stock is properly presented to theseveral dies, but it will be understood that other forms ofV corrugatingmechanism may be employed and that the corrugating rolls herein shownmay occupy any desired relation to the bed and guideway I therein; infact, thc corrugating rolls may be at one sido ot the guideway in thebed so as to produce a loop in the metal stock, whereby a. permanentallowance of slack will result in the metal, stock, as a result or'which the c 1-rrugated metal stock will not be under tension 'or drawntaut between the corruga'ing rolls and the guideway I of the bed.

The guideway I for the corrugated stock extends longitudinally withrespect to the bed A, one wall c' et said guideway beingintegral withsaid bed whereas the other wall is formedl by parts either integral withthe bed or removably fastened thereto. 'lhc Vwall z' is perpendicularexcept for a section c7 thereof, the latter being inclined in onedirection to the plane of the wall. The other wall of the guideway l isformed in part by permanent sections 2 integral with the bed, andintermediate these permanent sections are positioned the stoclndirectin3,` plate J and two clamping plates K L. One section 2 of the bed isprovided with a. face 3 inclined in an opposite direction to the iaee c"of the guideway, and immediately opposite tothe iace 2"" is anotherclamping member M, the purpose of which clamping members will presentlyappear.

The stock directing member .l is shown as a flat plate slidable on thebed A toward and from the Iguideway and with this slidable plate Jcoperates a corrugated or toothed roll J. the latter being adapted forengagement with the corrugated metal stock Cir so as to cooperate withsaid plate J in properly directing the metal stock into the guideway l.rlhe toothed roll J is mounted for idle rotation on the bed A in anysuitable way. As shown, the guide plate J is provided with a slot y'into which slot eX- tends a post 7" which is fast with the bed A, aidpost serving to limit the plate J to movement in a rectilinear path withrespect te the guideway I. `Within the slot y' of plate J is positioneda coiled spring J2, the latter being seated at one end against the guidepost j and at its opposite end against a wall of the slot 7' so thatsaid spring J2 acts on the plate J to normally press it toward thetoothed roll J.

The .swaging die is illustrated more particularly in Fig. 3, the samebeing shown as a solid block of metal secured in any dev sired way, asby a set screw d, in the lower part of the reciprocating head C. The dieis provided at its lower end with a groove D', the walls d of which areinclined relative to each other at predetermined angles. Said swagingdie D is movable with the head C toward and from the guideway I and thepath of the corrugated stock movable in said guidway, and upon thedownward movement of the head C the groove D in the swaging die isbroiiight into contact with the upper driving edge of the corrugatedstock, whereby the walls d of said swaging die groove will act upon theupper driving edge of the stock in a manner to compress the metal ofsaid stock. As a result of this operation one wall (Z of the swaging dieacts on the metal to produce an inclined fillet s on one face of themetal stock, whereas the other inclined wall d acts on the metal toproduce a reversely inclined lillet on the other face of the stock,whereby oppositely inclined bevels are produced on the respective facesof the metal stock, the stock at this stage of its manipulation being inthe condition shown at the left in Fig. 8. The operation of the swagingdie upon the metal stock requires that the stocl shall be held fixedlyin position, and to this end the stock S is fed in the guideway for thelower or bottom edge of the stock to bear firmly upon the bottoni wall 4of said guideway, whereas the stock itself is clamped laterally againstthe wall a' by the action. of the clamping plate K. shown, the clampingplate K is provided with a longitudinal slot 7^y into which projects aguide post Zr provided on the bed said slotted plate containing a springK operating on the plate to move it in a direction away from theguidewav l. The clamping plate l is iiroviiled with a lug c2 the upperface of which is beveled at k3. With said lug of the plate K coperates adepending stem K2 secured fixedlv to the head C., said stem be- .ingprovided with a beveled face k? see Fig. The depending stem K2 extendsbelow the operating face of the swagine` die D, said stein beingpositioned directly over and in the vertical plane of the inclined face7a3 of the upwardly extending lug t2 on the clamping plate. Now upon thedescent of the swaging die toward the stock the stem K2 moves downwardat the same time as said swaging die and the inclined face 7e* of saidstem contacts with the inclined face k3 of the lug of plate K, suchcontact of the stem with the lug being in advance of the contact of thedie with the stock, whereby the plate K is forced by the stem K2 againstone .side of the metal stock S for clamping the latter firmly within theguideway so that said metal stock is held immovably before and duringthe operation of the swaging die upon the upper driving edge of thestock. Upon the upward movement of head C and die D away from the stock,the stem K2 is withdrawn from the lug of the plate K., whereupon thespring K presses said plate l away from the guideway I releasing themetal stock and permitting the latter to be fed in the direction of itslength for a predetermined distance. From .the foregding description itis apparent that the swaging die operates upon the edge of the metalstock to produce oppositely inclinedbevels thereon, and, further, thatsaid die acts to displace the metal instead of removing it or cutting`it out, the action of the die taking place with precision so as tolocate the bevels and to bring the points of the resulting teeth in themedian plane of the corrugated strip.

The bevels produced on the corrugated stock by the action of the swagingdie may result in teeth which are not quite sharp enough to readilypenetrate the wood or other material into which the fastener is to bedriven, and to produce teeth with sharp points as well as to accuratelylocate the points in the median line of the fastener it is preferred toemploy an additional die E which, for the purpose of convenientlydesignating it,fwill be herein referred to as the pointing die. Said dieE is posi-y tioned next to the swaging die D. It con-l sists of a solidblock of metal with a groove E in the lower end face thereof, the wallsc of said groove being at a greater angle to each other than the walls din groove D of the swaging die. Die E is secured in the reciprocatinghead C so as to be directly over guideway I, said die E being securedXedly in the reciprocating head as by means of the set screw c. The dieE operates upon the beveled face corrugated stock. but the walls e ofsaid pointing die meet each other at suoli an angle that said walls actonly upon the points of the bevels .s on the stock, whereby die E servesa useful function in imparting sharp edges at s to the beveled portionsof the stock. This die E thus operates with a further swaging ac-- tionVupon the stock to point the resulting Y Y teeth at s in the'secondviewto the left of stock is directed between the Walls z' inner edge offixed guide plate N.

For the purpose of removing the metal Vfillets constituting the bevelson the respective faces of the metal stock We employ the dieiF to removethe'fillet constituting one bevel on one face of the stock and asimilardie G to, remove the fillet constituting the bevel on the opposite faceof the stock, said dies F G acting successively on the metal. Said diesF G are positionedone alongside the other and both being carried by thereciprocating head formovement in a rectilinear path therewitlnfsaiddies FVG being fitted removably in the head and retained fiXedly in'position therein by suitable clamping devices, such as the screws f g,respectively.

VThe clearing die F operates upon the fillets which constitute thebevels s on one face of the corrugated strip, and to effect the properremoval ofthese fillets the corrugated strip is inclined relative to thepath of the clearing die F because said clearing die moves in arectilinear path and it is desired to merely cut out the metal formingthe fillets and bevels von one face of the stock. Accordingly, .themetal stock is deflected toward the inclined face of guide- Y' Way I bythe action of a stem O on a lug Z of the clamping member L. The stem Ois shown in Fig. vas having a beveled face o adapted for contact Withthe beveled face 0 on the lug Z, and as the clearing die F descends thestem O acts on the plate L to force the latter into contact With themetal stock S, therebyv forcing said metal stock into an inclinedposition against the faceof the guidevvay," all as shown in Fig.k 5.Said plate Lis fitted slidably on the bed A, being guided by a post Z2which operates in a 'slot' Z3 of the plate, but normally the plate isretracted from the guideway by the action of a spring L positionedWithin the Vslotted part of the plate, see Fig. 2. The

clearing die F is provided with Va corrugated face f corresponding tothe eorrugationsY in p the metal stock, and when the corrugated stock isclamped fiXedlyin position and inclined to the path of the clearing die,the lower edge of said die acts upon the metal constituting the filletsor bevels 'on one face of said 'stock so as to cut out said metalfillets, this operation being indicated at s2 in the third view of themetal stoel; shown in Fig. 8, during which clearing operation of thefillets the die acts on the metal at the alternate corrugations.

Subsequent to the operation of the clearing die F the same length ofmetal stock is acted upon by the other clearing die G, the latteroperating to remove the metal con stituting the fillets or bevels on theother face of the corrugated stock. lVhcn the die Gr operates on thestock, the latter is moved into an oppositely inclined position fromthat which it assumes when the die F acts thereon and, accordingly, themetal stock is defieeted into contact with the beveled face 3 of theguideway, such deflection of the metal stock being due to the pressureof clamping plate M. It will be noted by reference to Fig. 2 that theclamping plate L is positioned at one side of the guideway I, whereasthe other clamping plate M is positioned at the opposite side of theguidcivay I, and thus the clamping plate L moves in a direction towardthe beveled face c when the clearing die F is to act upon the stock,Whereas the other clamping plate M moves in an opposite direction andtoward the inclined face 3 when the other clearing die Gr becomeseffective in acting upon the stock. The clearing die G is provided witha corrugated face g corresponding to the metal stock and similar to theface f of the clcaring die F, but as the die G is to act upon the faceof the stock opposite to that acted upon by the die F, it is apparentthat die G should be positioned in erosshead C reversely to die F; inother Words, the corrugated surface of die F faces in one directionwhereas the similarly corrugated surface of die G faces in an oppositedirection, all as indicated in dotted lines in Fig. 2. In addition toperfoiming the function of removing the metal on Well defined lines fromthe fillets produced on the surfaces of the corrugated strip, theclearing dies F, G, operate on thc metal of the strip so as to producebevels on the edge, Which bevels are in the concave portions of thecorrugated metal.

From the foregoing description it will be understood that the corrugatedstrip on one edge thereof is compressed in two directions oppositelyinclined to each other and result in the main bevels upon the convexportions of the strip; that the metal in said bevels is cut out alongcertain definite lines to produce the saw teeth, at which time any roughedges on the teeth, or in the spaces between thenn are removed by theclearing dies F, G, after Which the points of the saw teeth arecompressed so as to centrally position said points and to sharpen them.The initial compression of the edge of the corrugated strip produces, asstated, bevels on the concave surfaces, which bevels are changed intowell defined saw teeth by cutting the metal in said bevels on definitelines, so that in the operation of dies F, G two results are obtained,first, teeth are cut and rough edges on the teeth, and in the spacesbetween the teeth, are removed and, second, the dies act to shear theedge of the metal in the concave surfaces of the corrugated strip so asto produce bevels on said edge and in the concave portions of the strip,the net result being a continuous serrated cutting edge in a smoothsharpened condition, and free from roughness or irregularities. rlfhedies F, Gr, are each provided with a corrugated face f (see die F inFigs. 5 and 7 and die G in Fig. 6) whereby said corrugated faces of thedies conform to the corrugations of the strip, and in the operation ofthese dies upon the corrugated strip, said strip is presented first atone angle to the path of die F (see Fig. 5) and then in a reversed angleto the path of the die (see Fig. G), whereby the corrugated edges ofdies F, G, operate upon the swaged strip to cut the saw teeth andoperate in the spaces between said saw teeth for the purpose not only ofremoving the burs from said teeth and edges but for the performance ofthe additional function of producing bevels on the edge of thecorrugated strip, which bevels are in the concave portions of the strip,as clearly shown by Figs. 5 and 6, and which bevels in said concaveportions of the strip are additional to the bevels produced in theconvex portions of the strip by the action of the compressing dies.

rlhe clamping plate M operating in conjunction with the second clearingdie G is constructed similarly to the clamping plates K L, that is tosay, said plate M is provided with a slot m into which projects a fixedguide post fm and within which is positioned a spring M. Said plate isprovided with an upstanding beveled lug p with which cooperates adepending stern P on the crosshead C, said stem having a beveled endadapted to contact with the beveled face of the lug, for the purpose ofpressing the plate M against the stock, whereby the stock is broughtinto contact with lthe inclined face 3 of the guideway, so that thestock is clamped fixedly in an inclined position and in the path of thecorrugated face on the clearing die G.

The operation may be summarized as follows: rlhe metal stock S consistsof plain non-corrugated metal of the required width, gage and texture.The stock is fed through the machine by suitable feed mechanismoperating, as disclosed in the prior application to which reference hasbeen made, to impart intermittent movement to said stock. The metalpasses between and is subjected to the action of the coperating rolls HH which corrugate said metal, whence the corrugated metal passes intothe guideway I and said metal is directed by the coperating plate J androll J. All the dies D E F G reciprocate vertically with the head C,

and upon the downward movement of this head a length of stock S isgripped firmly in position within the guideway by the plates K L M,whereby all the dies act simultaneously upon the corrugated stock. Thedies D acts first on the stock by compressing' a portion of the drivingedge of the metal so as to produce fillets or inclined bevels upon apredetermined length of stock, one of said bevels being indicated at sin Fig. 8; thereafter the stoclr is moved a predetermined length so thatthe pointing die E acts upon the points or apices previously produced bythe die D upon the stock, thereafter the stock is again moved for theclearing die F to remove the metal constituting the fillets or bevels 8and finally the stock is moved beneath the die G which operates to cutout metal at s which previously formed the fillets or bevels on theopposite face of the stock. lt is thus apparent from the foregoingdescription that the intermittent movement of the metal stock bringssuccessive portions of said stock into position below the several dies,and as a result of the operation of the dies the metal is first swagedto form the bevels without cutting or removing any of the metal, thepointing die and the swaging die cooperate in accurately locating thepoints of the resulting teeth in the median plane of the strip, and thedies F Gr act on the respective faces of the strip in cutting out thefillets constituting the bevels. Fasteners produced on a machine of thisinvention will drive straight into the wood without a tendency to becomedeflected, and. will easily penetrate the wood or other material, forthe reason that the teeth are accurately positioned upon the drivingedge of the fastener and the teeth are sharpened so as to cleave theirway into the material.

Having thus fully described the invention, what we claim as new, anddesire to secure by Letters Patent is:

l. ln a corrugated fastener machine, the combination with means forfeeding a length of corrugated stock, of a ewa-ging die operating tocompress an edge portion of said corrugated stock, thereby producingembryo teeth with fillets, and means for removing said fillets.

2. ln a corrugated fastener machine, the combination with means forfeeding a length of corrugated stock, of a swaging die having meansacting simultaneously upon the respective faces of said corrugated stockfor compressing an edge portion thereof to produce embryo teeth withfillets therein, and means for cutting out said fillets.

3. In a corrugated fastener machine, the

combination with means for feeding a length of corrugated stock, ofmeans forV compressing an edge portion of said corrugated stock toproduce embryo teeth thereon.

4. In a machine for producing corrugated fasteners, 'the v lcombinationof means for sivaging an edge portion of corrugated stock to produceoppositely inclined surfaces l thereon, and cuttmgpmcans positioned foroperation upon the sivaged edge for cutting metal therefrom on definitelines to produce Well defined saw teeth. i

ln-a machine for; producing corrugated Y fasteners,'the coi'nbination ofswaging means operating'with compressive force upon an edgeportion of a.corrugated stoclrfor displacing themetal and producing inclinedvex-'portions Vof said corrugated stock, cutting means for removingmetal on Well defined* lines Vfrom said fillets, thereby producing sawteeth on the corrugated stock, andv means operating upon the points ofsaid teeth to position the latter in the medial plane vofv thecorrugated stock.

In a niachinefor producing corrugated fasteners, the combination of YsWaging means operating with .compressive force uponwan edge portion ofcorrugated stock for displacing themetal thereof and producing inclinedfillets upon the respective faces of said stock, aV pointing die movabletoward the path" of said Vmetal stock and contacting ,with the edgevportion thereof for-pointing Y the metal, and means for cutting out theViiiletsbetiveen the `Vcorrugations so as to re- Ysult-'i-n theproduction of, saiv teeth on 'the edgeof the metal stock.

8. vln a machine for producing corrugated fasteners, the combination ofasivaging die operating ivith'compressive'force upon corrugated jstockadjacent the edge portion Vthereof'for producing oppositely inclinedfillets' upon thesurfaces of. said stock, other dies positioned forcutting out the fillets on definiteV lines, thereby producing Welldefined sawteeth, and a pointing die the action of Which'is' limited tothe points of said teeth,"vvhereby the said points are sharpened byacompre'ssive action of said pointing die.

Y 9 ln .a Vmachine for producing 'corrugated fasteners, the combinationof sivaging Vmeansy operating with compressive force 4upon zanedgeportion of a length of corru-Y Ygated metal stock for producing filletsupon the respective faces of the metal stock, a plurality of clearingdies operating successively upon the swaged edge of said metal stock forcutting out said fillets, and means for presenting the metal stock inoppositely inclined directions to the successive action of the clearingdies.

10. ln a machine for producing corrugated fasteners, the combination ofa swaging means operating with compressive force upon an edge portion ofa length of corrugated metal stock for producing fillets upon therespective faces of the metal stock, a plurality of clearing diesmovable relative to the path of the metal stock and operatingsuecessively thereon for removing the fillets from one face and thenfrom the other face of said corrugated stock, and means for retainingtlie metal stock in an inclined position relative to one clearing dieand in an oppositely inclined position relative to the other clearingdie.

ll. ln a machine for producing corrugated fasteners, the combination ofa guide- Way Within which is fed a length of corrugated metal stock, asii/'aging die operable for compressing an edge portion of the metalstock, and stock-clamping means controllable by the movement of said dieso as to fiXedly position and release said stock.

1Q. ln a. machine for producing corrugated fasteners, the combination ofa guideivay Within which is fed a length of corrugated inetal stock, anda svaging die movable relatively to said stock for displacing metal froman edge portion thereof, said die being provided with a groove the Wallsof which are oppositely inclined for exerting a compressive force uponthe metal of the corrugated stock.

13. In a machine for producing corrugated fasteners, the combination ofa guideivay Within Which is fed a length of coirugated metal stock, aswaging die provided with a groove the Walls of which are positioned atpredetermined angles for exerting compressive force upon the edgeportion of the corrugated stock, and a pointing die provided vvith agroove the Walls of which are relatively positioned at a different anglefrom the Walls in the groove of the swaging die so that the pointing diewill act upon the swaged metal to point the same and to accuratelylocate the points in the median plane of the corrugated stock.

11i. In a machine for producing corrugated fasteners, the combination ofa guideivay Within which isfed a length of corrugated nietal stock,sivaging means for displacing metal relatively to the edge portion ofthe corrugated stock so as to produce fillets thereon, clearing diesmovable relatively to the siva ged edge of the metal stock, and meanscontrollable by the movement of said clearing dies for retaining themetal stock in fixed position and in the path of said dies.

15. ln a machine for producing corrugated fasteners, the combinationwith a guideway within which is fed a length ofl corrugated metal stock,of a swaging die re ciprocable with respect to the guideivay forproducing fillets upon the edge portion of the metal stock, a pluralityof clearing dies also movable relative to the guidevvay, said dies beingpositioned for operation successively upon the swaged edge of the metalstock and operating to remove the metal fillets therefrom, and means forpresenting the metal stock in a position inclined to the path of theclearing dies.

16. ln a machine for producing corrugated fasteners, the combination ofa guidevvay, a clamping member movable relative thereto, a reciprocatingdie having means contacting With the respective faces of a length ofcorrugated stock for compressing the edge portion thereof, and meansdepend ent upon the movement of the die for imparting movement to theclamping member relative to the guidevvay.

17. ln a machine for producing corrugated fasteners, the combination ofa guide- Way Within which is fed a length of corrugated metal stock, theWalls of said guide- Way being provided at intervals with reverselyinclined lengths or sections, clamping members in cooperative relationto said inclined Walls, sWaging means movable relatively to the guideWayfor operating upon the metal stock, clearing dies also movable relativeto the guidevvay, and means dependent upon the movement of said dies forimparting movement to said clamping members.

18. In a machine for producing corrugated fasteners, the combination ofsWaging means operating upon corrugated stock adjacent an edge portionthereof for producing oppositely inclined surfaces upon said stock, anddies provided With corrugated faces Which conform to the corrugations ofthe stock, said dies operating to cut metal from the inclined surfaceson definite lines for producing Well defined saw teeth.

19. ln a machine for producing corrugated fasteners, the combination ofswaging dies operating upon corrugated stock adjacent an edge portionthereof and producing inclined surfaces upon said stock, cutting dieseach having a face corresponding to the corrugations of the stock, saiddies acting upon the inclined surfaces of the stock for removing metaltherefrom on definite lines, and means whereby the cutting dies and thecorrugated stock are relatively positioned for said dies to shear themetal in a plane inclined to the medial line of the corrugated stock.

ln testimony whereof We have signed our names to this specification inthe presence of two subscribing Witnesses.

SPENCER C. CARY. HERlMlAN H. BRAND.

Witnesses:

A. S. BRANDES, H. MERKEL.

Copies of this patent may be obtained for ve cents each, by addressingthe Gommissioner of Patents, Washington, D C.

